17th Annual ECSS-Congress, Bruges 2012

Abstract details

Abstract-ID: 726
Session: [OP-SH25] Children & Physical Exercise
Lecture room: 0.31 & 0.32
Date & time: 07.07.2016 / -
Title of the paper: Effects of school based exercise intervention on motor performance, blood pressure and arterial compliance in children
Authors: KETELHUT, S., HACKE, C., KETELHUT, K.
Institution: Martin-Luther-Universität Halle-Wittenberg, Otto-von-Guericke-Universität Magdeburg, University Medical Centre Hamburg-Eppendorf, SRH Hochschule für Gesundheit Gera
Department: Sport Science
Country: Germany
Abstract text Introduction: It is widely accepted, that sedentary lifestyle impairs motor performance (MP) and increases blood pressure (BP) in the young. Even though increased BP may lead to structural changes in vessels already at early age (Berenson et al., 1998), research assessing exercise effects on vascular function in children are spares. The present study aimed to evaluate the effectiveness of an exercise intervention (EI) on MP and BP but moreover on established markers of arterial compliance (AC). Methods: 105 students (mean age 8.2 ± 0.6 yr; 51% girls; BMI 17.8 ± 3.0 kg/m2) were randomized into intervention (IG) (N = 51) and control (CG) (N = 54) group. During a 37-week experimental period the IG received an additional EI (2x45min per week) on top of the regular school physical education class (3x45min per week). Apart from a MP-test (’CHECK!’), peripheral (pBP) and central (cBP) blood pressure, augmentation pressure (AP) and aortic pulse wave velocity (aPWV) were assessed non-invasively using Mobil-O-Graph (24 PWA monitor, IEM Stolberg, GERMANY). Multilevel linear models with random effects for schools and classes were used to analyze the effectiveness of the EI. Differences between the mean change of the outcome variable in the IG and CG were adjusted for confounders (age, sex, height and the variable at baseline). Results: There was a significant difference in the mean improvement in endurance performance (62.02 ± 168.09 m; p< .001), AP (-2.34 ± 7.47 mmHg; p= .007) and aPWV (-1.95 ± 0.718 m/s, p= -037) throughout intervention period, favoring IG. Furthermore the EI induced a significant decrease in peripheral (-4.34 ± 11.84 mmHg) and central (-3.93 ± 8.94 mmHg) systolic BP, AP (- 1.67 ± 3.73mmHG) and aPWV (-0.18 ± 0.35 m/s) in the children. Discussion: Already in children a school based EI had beneficial effects not only on endurance performance but moreover on aPWV and AP, as important determinants of left ventricular function and coronary blood flow (Gatzka et al., 1998). These positive effects may be due to an exercise induced improvement in endothelial function and vasoactive substances (Beck, et al., 2013). Based on the findings it seems advisable to increase regular physical activity in early childhood to positively influence cardiovascular risk profile. Future research should focus not only on BP but moreover on parameters of AC displaying higher prognostic value for cardiovascular morbidity (Roman et al., 2007). References Beck DT, Martin JS, Casey D, Braith W. (2013). Am J Hyp., 26 (9), 1094-1102. Berenson G, Sirinivasan S, Newman W. 3., Tracy R. & Wattigney W. (1998). N Engl J Med., 338, 1650-1656. Gatzka CD, Cameron JD, Kingwell BA, et al. (1998). Hypertension, 32, 575-578. Roman M, Devereux R, Kizer J, Lee E, Galloway J, Ali T, et al. (2007). Hypertension, 50 (1), 197-203. Contact sascha.ketelhut@sport.uni-halle.de
Topic: Sports Medicine and Orthopedics
Keyword I: exercise intervention
Keyword II: endurence performance
Keyword III: arterial compliance